Tank track deformation rigging for Unity. Worked well before, fixed a problem and created more
First you can delete the faces on the sides of the track segments, where they connect. These will end up on the inside of the track where you can't see them, so you don't need them.

When you merge your track segments (to get rid of the staircase effect) by checking the Merge box in the Array modifier, you can also check the box First Last to close the loop. It doesn't always work though, like in my example.

But that's not a problem. : )

You can close the loop manually in Edit Mode, after applying the modifiers. Select pairs of vertices than need to be connected and press F. Then use F to make faces between the newly created edges.

Or select al the 8 vertices you want to connect and do Edge &gt; Bridge Edge Loops.

Or you can add a Weld modifier, and increase the distance until the gap is bridged.